Oura Ring 5: full spec sheet and buying guide

Updated September 29, 2026 · Category: Wearables · Content based on official specifications and public Amazon buyer ratings, not a hands-on test.

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The Oura Ring 5 is Oura's newest ring. Oura says it's 40% smaller than the previous generation, with re-engineered sensors for more precise data. At the time of writing it holds a 4.4/5 average from more than 2,217 Amazon ratings.

★ 4.4/5 on Amazon

Oura's smallest and lightest titanium ring, larger re-engineered sensors, 50+ health metrics including metabolic health, and 6 to 9 days of battery.

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Ratings and prices are as shown on Amazon at the time this article was published and may have changed. Affiliate disclosure.

What's new

Oura says the Ring 5 is 40% smaller than the previous generation, thinner, lighter and more scratch-resistant, with larger, smarter sensors for more precise personal health data. It tracks 50+ metrics, adding metabolic health to sleep, activity, stress, heart and women's health. Oura Advisor offers AI guidance on energy, sleep and weight.

Sizing, membership and battery

Ring 5 sizes differ from standard ring sizes and from other Oura generations, so use the Oura Ring 5 Sizing Kit first. The first month of membership is included for new members, then $5.99 per month. Battery life is 6 to 9 days.

Strengths based on its spec sheet

Oura's smallest, lightest ring
More precise sensors, per Oura
Metabolic health metrics
Integrates with 40+ apps

What to consider before buying

$5.99/month membership after the first month
Sizes differ from the Ring 4, so you need a new sizing kit
Battery range (6-9 days) slightly below the Ring 4

Want to compare this model with other wearables and health devices? Check out our wearables buying guide.

Who is it ideal for?

People who want the most discreet smart ring and the latest Oura features.

Who is it NOT the best option for?

If you want to spend less, the Oura Ring 4 or subscription-free RingConn are alternatives; compare them in our wearables buying guide.

Frequently asked questions

Is the Oura Ring 5 the same size as the Ring 4?

No, Ring 5 sizing differs from other Oura generations; use the Ring 5 Sizing Kit.

Does it need a membership?

The first month is included for new members, then $5.99/month.

How long does the battery last?

6 to 9 days, according to Oura.

Is the Oura Ring 5 the right fit for you?

See current price on Amazon